Encouragement to honor one's neighbor and guest, and the obligation to remain silent unless one has something good to say, and the fact that all of that is part of faith
It is reported on the authority of Abu Huraira that the Messenger of Allah (ﷺ) observed:
He who believes in Allah and the Last Day should either utter good words or better keep silence; and he who believes in Allah and the Last Day should treat his neighbour with kindness and he who believes in Allah and the Last Day should show hospitality to his guest.
Reference: Sahih Muslim 47 a In-book : Book 1, Hadith 80 USC-MSA web (English) : Book 1, Hadith 75 (deprecated)
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